Section 327IAC15-16-4. Definitions

   The definitions in IC 13-11-2, 327 IAC 5-1.5, 327 IAC 19-2, and 40 CFR 122.23 and the following definitions apply throughout this rule:

(1) "Agricultural storm water discharge" means a precipitation related discharge from a land application area where the manure, litter, or process wastewater has been applied in accordance with this rule and site-specific nutrient management practices to ensure the agronomic utilization of the nutrients in the manure, litter, or process wastewater as provided in 33 U.S.C. 1362(14) and 40 CFR 122.23(e).

(2) "CFO approval" means a valid approval issued by the commissioner under 327 IAC 19.

(3) "Manure storage area" means any area where manure is kept. The term includes, but is not limited to, the following areas:

(A) Lagoons.

(B) Runoff ponds.

(C) Storage sheds.

(D) Stockpiles.

(E) Under house or pit storage.

(F) Liquid impoundments.

(G) Static piles.

(H) Composting piles.

(4) "NRCS 590 standard" means the Indiana Natural Resources Conservation Service (NRCS) Nutrient Management Conservation Practice Standard, Code 590, July 2001, available from the Natural Resources Conservation Service, Indiana Field Office, 6013 Lakeside Boulevard, Indianapolis, Indiana 46278-2933 or online at http://www.in.nrcs.usda.gov/. The standard may be viewed and copied at IDEM Office of Land Quality, 100 North Senate Avenue, Eleventh Floor, Indianapolis, Indiana.

(5) "One hundred (100) year, twenty-four (24) hour rainfall event" means a twenty-four (24) hour precipitation event with a probable recurrence interval of once in one hundred (100) years, as determined using NOAA Atlas 14, "Precipitation-Frequency Atlas of the United States, Volume 2 Version 3.0", revised 2006*.

(6) "Overflow" means the discharge of manure or process wastewater resulting from the filling of wastewater or manure storage structures beyond the point at which no more manure, process wastewater, or storm water can be contained by the structure.

(7) "Setback" means a specified distance from surface waters or potential conduits to surface waters where manure, litter, and process wastewater may not be land applied. Examples of conduits or potential conduits include, but are not limited to, the following:

(A) Open tile line intake structures.

(B) Sinkholes.

(C) Agricultural well heads.

(8) "Twenty-five (25) year, twenty-four (24) hour rainfall event" means a twenty-four (24) hour precipitation event with a probable recurrence interval of once in twenty-five (25) years, as determined using NOAA Atlas 14, "Precipitation-Frequency Atlas of the United States, Volume 2 Version 3.0", revised 2006*.

  *Copies are available from the National Weather Service, Office of Hydrologic Development, 1325 East West Highway, Silver Spring, MD 20910 or online at http://www.nws.noaa.gov/oh/hdsc/currentpf.htm. (Water Pollution Control Division; 327 IAC 15-16-4; filed Feb 6, 2012, 2:50 p.m.: 20120307-IR-327090213FRA, eff Jul 1, 2012)